Friedrich siemens



P. SIEMENS.

(No Model.)

GAS STOVE.

No. 597,029. Patented Jan. 11,1898.

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UNITED STATES A'rnN'r rrrcn,

FRIEDRICH SIEMENS, OF DRESDEN, GERMANY.

GAS-STOVE.

SPECIFICATION forming part of Letters Patent No. 597,029, dated January 11, 1898.

Application fil d November 19,1895. dsi'ial No. 569,455. (No model.) Patented in Italy December 21, 1894,11XXIV, 205.

To all? whom it may concern:

Be it known that l', FRIEDRICH SIEMENS, a subject of the King of Saxony, residing at Dresden, in the Kingdom of Saxony and Empire of Germany, have invented a new and useful Gas-Stove, (for which I have obtained a patent in Italy, No. 205, Vol. 74, hearing date December 21, 1894,) of which the following is a specification.

The invention relates to stoves which are heated by gas, and especially to that kind of gas-stove in which, for imitating the etfect of an open fireplace, a reflector is employed for the purpose of throwing through the fireplaceopening at the base of the stove a great portion of the rays of light and heat sent out by the heating flames into the room to be heated.

In the drawings, Figure 1 is a vertical section of a gas-stove constructed according to this invention. Fig. 2 is a horizontal section on line 2 2 of Fig. 1. Fig. 3 is a cross-section and a front view of a part of the burner-tube.

Opposite to the fireplace-opening a is placed the reflector 1), extending in a concave curvature to the lower ed go of this opening. Above the upper edge of the reflector is located a horizontal chamber 1), within which is arranged the horizontal burner-tube c, the cock (Z of which for controlling and cutting off the supply of gas being placed outside the stove. The burnenopenings e are disposed at the front side of the tube 0, forming, as shown in Fig. 3, two superposed horizontal rows, each opening of one row being placed in the same vertical plane with an opening of the other row. The flames issuing from the burner-tube extend through the front opening of the chamber 11. An igniting-tube may be provided in any suitable way, and a cutoff cock for the same combined with the cock d.

The bottom of the stove has two openings f and g at the front and at the back, respectively, the first of which belongs to the chamber 72 beneath the reflector I), while the other is the bottom opening of the vertical channel- 2', arranged at the back of the stove and opening in the upper part of the same. The

channel 2' isformed by a partition 1" in connectionwitlr the rear wall of the stove. The space is is upwardly confined by a perforated cover-plate 1 and incloses the chimney m, which by its exit-tube Z- may communicate or with a chimney-flue or ventilation-flue or more directly with the open air. A channel a crosses slopingly the chimney m and connects the back and front parts of the space Behind, so as to project downwardly, and above the reflector h is a regenerative chamber comprising three sheet-metal walls 1t 0 19, forming three channels (1 'r s. The first channel q, located between the reflectorb and the wall it, leads from the chamber 71., and its upper aperture lies behind the burner-tube c and connects with the chamber 5'. The second channel r, which is formed between the walls 72 and 0, has its entrance t at some distance in front of the burner-tube c and communicates at u with the third channel 8 between the walls 0 and p, which at its upper end communicates with the chimney m through the opening '0. The front wall to of the channel 'r is concealed by a plate 7:, arranged at some distance.

The regeneration-that is, the preheatin g of the air which flows to the burner-tube by the hot gases of combustion is in the described gas-stove effected as follows: The flames produced by the gas-jets of the burnertube enter into the channel r through the opening 15. In this channel the hot products of combustion flow downward to the passage 11, and on their way they give oif a great portion of their heat to the air, which, after having passed through the opening f into the chamber 71, rises in the channel q up to the burner-tube c. The gases of combustion flow upward from the passage a through the channel s and escape by 42 into the chimney m.

The reflector transmits the radiant heat of the flames into the room. The heat of the gases of combustion, inasmuch as it is not absorbed by the air of combustion passing the channel q of the regenerator, increases the temperature of the wall 12 of channel 8 and of the walls of chimney m and channel 2 and produces thereby currents of air entering the stove through the openings f and g from the front and back sides and escaping into the room through the cover 2 as indicated by arrows in Fig. 1. By this circulation a great portion of the heat of the combustion-gases is transmitted to the air in the room to be heated. Notwithstanding that the either with the room to be heated by the stove gases escape from the chimney m in a rather cooled condition the column of gases filling the chimney m is yet able to produce the draft required for moving the air and the gases of combustion through the channels.

The arrangement of the burner-openings in couples, each couple being situated in one vertical plane, is of great importance for completing the combustionand increasing the temperature of combustion; but this effect depends upon the use of the described regenerator, for only air'of a very high temperature is able to enter the interstices between the jets of gas escaping from the burner-openings with such velocity, and in consequence in such quantity that the flames formed from the said jetsobtain a higherintensity of combustion in those parts which are next to the other row of flames than at their outer sides, which are, more exposed to be cooled by radiation. The improved gas-stove presents, therefore, if compared with the constructions known heretofore,a double increase of the intensity of combustion, one produced by the use of a regenerator and the other obtained by distributing the burner-openings in groups of two or more, the members of each group be ing arranged in one vertical plane.

I claim as my invention 1. Agas-stove comprising a body having an air-inlet in its lower part, an exit-opening in its upper part for the products of combustion, and a fireplace-opening, a reflector located opposite to the fireplace-opening and providing in connection with the side wallsand with the rear wall of the body, an air-chamber with which the air-inlet communicates, a regenerative chamber formed with an outer wall, with an intermediate wall, and with an inner wall, and extending horizontally and downwardly into the air-chamber and providing a burner-chamber above the reflector, and a burner-tube located in the burner-chamber:

the outer wall providing in connection with the reflector, an tip-channel for air, the inter mediate wallproviding, in connection with the outer wall, a down-channel for the products of combustion, and the inner wall providing, in connection with the intermediate wall an tip-channel with which the downchannel and exit-opening communicate; substantially as described.

2. A gas-stove comprising a body having a front air inlet in its lower part, a rear air-inlet in its lower part, an exit-opening in its upper part for the products of combustion. and a fireplace-opening, a partition providing in connection with the'rear wall a vertical air-channel over the rear air-inlet, a reflector located opposite to the flreplace-opening and providing in connection with the side walls of the body and with the partition an air-chamber with which the air-inlet communicates, a regenerative chamber formed with an outer wall, with an intermediate wall and with an inner wall, and extending horizon tally and downwardly into the air-chamber and providing a burner-chamber above the reflector, and a burner-tube located-in the burner-chamber; substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

/ FRIEDR. SIEMENS,

Witnesses:

HERNANDO DE Soro,

MAX SOHULZER. 

